What is the standard requirement for satisfactory evidence of a signer's identity?

Satisfactory evidence of identity typically means a current (unexpired, or recently expired where state law allows) government-issued identification document that bears the signer's photograph, signature, and physical description — such as a driver's license, state ID, or passport. When the signer lacks such ID, many states allow identification through one or more credible witnesses who personally know the signer and can swear to their identity. A notary must be reasonably certain of the signer's identity before notarizing; relying only on the signer's word or non-photo documents is generally insufficient. Proper identification is a core safeguard against fraud.